Vanuatu was an hour. The only extended premieres before Gabon (which is 99% likely to just be the first two episodes shoved together...a two-hour premiere would throw everything off two weeks from the plan; two episodes together doesn't alter airdates whatsoever besides the premiere) were Amazon, with the heavily hyped battle of the sexes, and PI, both of which were back in the days where Survivor was a top 5 show scoring 20 million+ viewers each week.